What the family will remember about the day is that you were there... nothing else really matters. Remember, after a week or two, a kind word, card or phone call will be greatly appreciated as well...
Better yet, go out of your way to take a dish of cookies (your biscuits), pie or cake over to them, if possible and don't avoid the subject if they bring it up. Most families are very vulnerable to the feeling that everyone will just forget them and the child after the tragic loss... follow up means a lot, at least here in the western U.S. and I can't imagine it's not a universally appreciate gesture...